Honda TRX450R Service Manual page 479

IGNITION SYSTEM (After '05)
OPERATION INSPECTION
If the engine does not start, check for the following.
Remove the throttle housing cover (page 17-9).
Remove the throttle drum cover (page 8-7).
Operate the throttle lever and check for smooth
operation of the throttle drum in all steering posi-
tion. If the throttle drum operation is not smooth,
lubricate or replace the throttle cable.
Check the throttle lever free play (page 4-6).
NOTICE
The ICM will cut-off the ignition when the throttle
lever free play is adjusted to less than 5 mm (7/32
in). If the engine does not start, check the throttle
lever free play and readjust it.
If the throttle drum operation is normal and the
engine still does not start, check the throttle lever
switch and carburetor switch (page 22-13).
THROTTLE CABLE H THROTTLE LEVER
SWITCH
THROTTLE DRUM
SYSTEM INSPECTION
Check the throttle cable operation.
THROTTLE LEVER SWITCH
Remove the front fender (page 3-6).
Disconnect the ICM 4P black connector.
Check for continuity between the terminals of the
connector.
TERMINALS:
Gray/red terminal (+) - Green terminal (-)
There should be no continuity when the throttle
lever is fully closed and continuity when the throttle
lever is open.
If the throttle lever switch operation is incorrect, dis-
connect the throttle lever switch 2P green connector
and check for continuity between the terminals of
the switch side.
THROTTLE LEVER CLOSED:
THROTTLE LEVER OPEN:
NO CONTINUITY
CONTINUITY
If the throttle lever switch operation is still incorrect,
replace the throttle lever switch assembly (page 17-
9).
If the throttle lever switch is OK, check for open or
short circuit in wire harness.
If both the throttle lever switch and wire harness are
normal, replace the ICM and inspect again.
(THROTTLE LEVER SWITCH
2P CONNECTOR
22-13